baber/WOPTO huggingface dataset:
Patent GB-846861-A (GB)
Title: Process of recovering uranium
IPC: C01B15/047
Filed: 1945-12-04
Abstract: In the separation of isotopes of uranium by means of a calutron, such as is described in Specification 816,772, by vaporization of a charge of uranium tetrachloride, the uranium values are recovered from parts of the calutron by washing them with a solvent for uranium whereby metal impurities including iron are introduced into the wash solution; the pH of the solution is then adjusted to 1:3, the solution refrigerated to produce ice crystals therein and then treated with hydrogen peroxide thereby precipitating uranium peroxide.  The uranium peroxide may be calcined to the trioxide and the latter reacted with carbon tetrachloride to produce uranium pentachloride which on calcining <PICT:0846861/III/1> gives uranium tetrachloride for recycling to the calutron, or alternatively the uranium trioxide may first be reduced by methane to the dioxide and thereafter reacted with calcium tetrachloride to give uranium tetrachloride direct.  As shown in Fig. 3, a solution derived from washing or acid treating parts of the calutron to take up the uranium values and generally contaminated with copper, iron, chromium and nickel, is first treated with carbonate-free ammonium hydroxide solution or excess ammonia gas thereby precipitating ammonium diuranate and the hydroxides of iron and chromium away from the copper and nickel which remain in solution as amine complexes.  The precipitate after washing is taken up in nitric acid and depending on its ferric ion content is, or is not, treated with a complexing agent such as lactic acid, acetic acid or a fluoride ion thereby inhibiting the catalytic decomposing effects of the ferric ion on hydrogen peroxide.  If the ferric ion content is below 3% this is not necessary.  In either case the solution is then treated with ammonium hydroxide to adjust the pH between 1 and 3 and the solution thereafter cooled below its freezing point to form minute ice crystals.  Pre-cooled hydrogen peroxide is added in excess and the solution is refrigerated to a solid mass at temperature for example of -45 DEG C.  It is then thawed to the incipient freezing p  range namely -2 to -10 DEG C. whereupon the solution may be filtered and the precipitate of uranium peroxide washed with an aqueous solution containing ammonium nitrate and hydrogen peroxide.
Patent GB-178877-A (GB)
Title: Improvements in die heads of screw cutting machines
IPC: B23G5/12
Filed: 1920-11-22
Abstract: 178,877. Harris, C. W. Nov. 22, 1920. Screwing die-heads; chasers.-The die-head described in Specification 147,292 is modified for use as a self-opening stationary die-head. The chaserholders d, mounted on a carrier-plate c slidably keyed on the reduced end of a hollow shank a, are each provided with a roller engaging a slot f<1> in the cam-ring f. The dies are secured in an inclined slot g in the holder by means of a plate i, and are adjusted by a screw h. The cam-ring is secured to a slotted back-plate j by studs, and a flanged ring l screwed to the carrier plate serves to hold the cam-ring back-plate and carrier-plate together for simultaneous longitudinal movement. A circular groove in the back-plate receives springs m located between screws secured to the shank and stops in the groove. A rotatable ring p on the shank carries a latch q adapted to engage one of the stops in two positions for roughing and finishing cuts, and a screwed plunger abutting against a stop secured to the shank facilitates fine adjustment of the dies. In operation, the die-head is set by means of a mark on the cam-ring coacting with calibrations on the back-plate, and the latter is rotated to engage the latch with the stop for the roughing-cut. When the forward movement of the work is arrested the die-holder, cam-ring, and back-plate are drawn clear of the latch against the action of springs w and the die is opened. The latch may then be reset for the finishing-cut.
Patent GB-675231-A (GB)
Title: Insecticidal compositions
IPC: A01N29/12
Filed: 1949-12-23
Abstract: 675,231. Insecticides. NAAMLOOZE VENNOOTSCHAP DEBATAAFSCHE PETROLEUM MAATSCHAPPIJ. Dec. 23, 1949 [Dec. 24, 1948], No. 32909/49. Class 81 (i)'. An insecticide consists essentially of an organic solvent of relatively low volatility in which is dissolved an insecticide of the D.D.T. type and a natural or artificial resin in amount less than 50 per cent by weight of the insecticide. An emulsifying agent may also be present or the solution may be emulsified in water. By D.D.T. type is meant compounds of the formula R 1 R 2 CHCX 3 , where R 1  R 3  are organic radicals which may or may not contain halogen, and X is chlorine or bromine. Suitable resins are natural resins such as colophony and synthetic resins such as phenol-formaldehyde, resins modified by treatment with natural resins, alkyl resins, or drying oils, maleic acid resins, pentaerythritol resins and pentaerythritol resin esters. Suitable solvents are kerosine, gas oil, tetrahydronaphthalene, and an aromatic extract of petroleum.
Patent GB-1071090-A (GB)
Title: A method of separating a mixture of saturated and unsaturated alcohols
Inventor: MAYOROV DMITRY MIKHAILOVICH
IPC: C07C33/025
Filed: 1964-08-12
Abstract: Saturated alcohols are separated from unsaturated alcohols, when each contain 16-22 carbon atoms, by dissolving the mixture in acetone in the ratio 1 part mixture to 5 parts by weight acetone, cooling the solution to +2 DEG  to - 15 DEG  C. to crystallize the saturated alcohols and filtering off the crystals at 2 DEG  to - 15 DEG  C. The acetone may be distilled from the filtrate to leave the unsaturated alcohols.  The process is illustrated by examples.
Patent GB-732335-A (GB)
Title: Improvements in or relating to x-ray tubes
IPC: H01J35/08
Filed: 1953-11-27
Abstract: 732,335. X-ray tubes. PHILIPS ELEC. TRICAL INDUSTRIES, Ltd. Nov. 27, 1953 [Dec. 1, 1952], No. 33000/53. Class 39 (1). The tungsten target 2 of an X-ray tube anode is a small plate which has two opposite sides 3, 4 bent at an angle and penetrating into the copper support 1, so that the whole plate, except for the target area, is embedded in the copper. The object is to preserve good thermal contact between the target and the support, and to further this end, a plug 5 of tungsten wool may be sealed directly behind the target.
Patent GB-1090610-A (GB)
Title: Matrix serial printer
IPC: B41J2/22
Filed: 1966-07-22
Abstract: 1,090,610. Selective printers. RADIO CORPORATION OF AMERICA. July 22, 1966 [Aug. 6, 1965], No. 33061/66. Heading B6F. Printers wherein characters are formed by a number of separate elements.-A plurality of planar printer bar structures 198 disposed in side-by-side relationship and extending across the page normal to a paper to be printed are each formed by two parallel bars 200, 202 spaced by a number of struts 204a, 204n, arranged in regular zig-zag patterns along the structures, the patterns of adjacent printer bar structures being out of phase with one another so that area of contact between adjacent bars is small and so the bars may be moved independently to effect impression on the paper positioned between the bars and a small platen or anvil 270 moving in letter-space direction. As shown, there are seven bars 198 contained in a housing 24 which overlies a forward straight section of a raceway 18 accommodating three platen anvil assemblies 20. The bars 198 are pivotally suspended on links 223, 230, one of the links being extended to form the armature of an electromagnet 226. There is one magnet for each bar and are selectively operated to form the character by impression in sucessive whims as the anvil travels along the printing line. Platen; letter-spacing.-The platen anvil assemblies 20 comprise a roller 270 loose in carriage 270 borne on pairs of rollers 272a, 274a and attached to a continuously driven chain 286 operated from an electric motor. Accommodating various numbers of papers.- The printer bars 198 are lightly sprung to continuously engage the paper and the combined thickness of the webs has no effect on the impression action of the electromagnets 226. Pin - tractor paper - feeding; line - spacing.- The paper webs 72 are fed horizontally below the printer bar structures 198 by two pairs of pin-feed chain assemblies 76, 78, 80, 82 transversely adjustable on bars 84, 120 and shafts 92, 132. The latter are coupled together by bevel gearing to feed the webs to and from the printing position. The back bevel 124 drives the back tractor shaft by way of a spin differential gear housed in box 128. The spider containing the planetary gears is biased by a spring 134 to maintain the webs flat and under tension. The chains forming the pin feed tractorshave a cranked section mounting the pins and are advanced for line-spacing by a rotary electromagnet 154. Reverse rotation is prevented by a ratchet and pawl. An over-centre, two-way biased guide plate 102 with a slotted aperture (108) is urged by a spring 104 into position over the pins during feeding operation and into vertical position when threading the paper into position. Types and printing surfaces.-The print bars 198 may be made of stainless steel by chemical etching. The thickness is about 0À014 inch and the width of the struts the same. One surface of the side of the structure is ground above and below the lines A-A, B-B. Fig. 5, to about 0À012 or 0À013 inch.
Patent GB-807308-A (GB)
Title: Improvements in and relating to clarification plant for service and waste waters
IPC: B01D21/24
Filed: 1955-11-18
Abstract: 807,308. Gravity-separation apparatus. SAMERAUS, A. Nov. 18, 1955 [Nov. 19, 1954], No.33081/55. Class 46. A circular clarifying basin 1, Fig. 2, with central feed channel 2, outer peripheral liquid launder 5, rotating girder bridge 9, scrapers 13, central sludge-pump 6 and bridge-located sludge-pump unit 10 (or suction pipe) has a transverse pump platform 14 suspended from the bridge a short distance above the highest liquid level. The pump unit 10, Fig. 3, can be rocked, about mountings on the platform 14, into a horizontal position and can be removed by block and pulley, first along a rail 17 longitudinally of the platform 14 and then along a rail 12 longitudinally of the bridge. Each scraper 13, Fig. 4, is secured to two rods 18, each sliding in a guide 19, Fig. 2, and may be raised above the liquid level by chains or ropes 20 passing over pulleys 21 and secured to pullrods 23 linked together and to a winch or the like (not shown), which serves to operate all the scrapers or a group of them. The pull rods are disposed beneath the bridge. The two innermost scrapers 13, which must be so disposed and of such a length as to clear the platform 14 on being raised, are joined when in the lowered position by a removable angled plate 27, Fig. 2, to ensure accumulation of the sludge in the vicinity of the pump inlet.
Patent GB-424711-A (GB)
Title: Improvements in or relating to radio and like receivers
IPC: H03G3/26
Filed: 1933-11-27
Abstract: 424,711. Valve circuits for wireless reception. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London.-(Assignees of Starrett, J. S. ; Burnet Hill Road, Livingston, New Jersey, U.S.A.) Nov. 27, 1933, No. 33200. Convention date, Nov. 25, 1932. [Class 40 (v)] Muting and volume control potentials for a receiver embodying automatic volume control are derived from a double-diode triode valve. In one embodiment, a doublediode-triode valve 55 with cathode 3, grid 4, anode 5 and diode anodes D1, D2 is connected as follows. The modulated signals from a circuit 2 are applied to the diode D1 through a load resistance R1 from which the rectified signals are fed through a condenser C1 to the grid 6 of the first low frequency amplifier 46. Circuit 2 also feeds the diode D2 through condenser C3 and load resistance R2, the D.C. potential across the latter being supplied through the filter R4, C5 and lead 7 to control the amplification of the carrier amplifier. The A.V.C. is delayed by the application of a negative potential to the diode anode D2 from a potentiometer C. The potential across the resistance R2 is also applied to the grid 4 of valve 55 for noise suppression ; when no signal is being received, the grid potential is arranged to allow current to flow in the circuit of the anode 5 through a resistance R3, which is also in the grid circuit of valve 46 and biasses the latter to cut-off. When a signal is received this bias is removed owing to the cessation of current flow in the triode portion of valve 55 due to the change in grid potential of this valve. In a modification of this arrangement, Fig. 2, (not shown), the diodes are arranged for full-wave rectification the load resistance providing low frequency potentials for amplification, D.C. potentials for undelayed A.V.C., and the noise suppression potential for the grid 4. In another circuit, Fig. 3, the valve 55 is arranged to act as three diodes the anode D3 of the triode portion being connected to the grid. The carrier signals are applied to the diode D1 direct and the other diodes D2, D3 through condensers C<1>2, C<1>3. The diode D2 acts as signal detector, the low frequency potentials from its load resistance R2 being applied through a condenser C<1> to the grid 6 of the first low frequency amplifier 46. The diode D3 provides delayed A.V.C. potentials from its load resistance R<1>3, being negatively biassed from part of the potential divider EH. The diode D1 produces, when a signal is being received, a D.C. potential in its load resistance R1 which cancels the cut-off potential on the grid of valve 46, the resistance R1 being included in the grid circuit of the latter. In a modification of this arrangement, Fig. 4, (not shown), the cut-off bias of the first low-frequency valve which is a pentode, is applied to the suppressor grid. Specifications 404,583 and 410,619 are referred to.
Patent GB-648600-A (GB)
Title: Improvements in and relating to mechanism for the opening and closing of windows
IPC: E05F17/00
Filed: 1948-12-24
Abstract: 648,600. Pivoted window regulators. TELEFLEX PRODUCTS, Ltd., and BENTLEY, J. S. Dec. 24, 1948, Nos. 33309/48 and 24416/49. [Class 20(iii)] Operating apparatus for pivoted windows comprises a flexible metal cable, consisting of a core having an external helical winding mounted in a conduit, means being provided to move the cable to and fro in the conduit, its helical projections meshing with a number of suitably supported gear wheels, the rotation of which causes secondary gear wheels, coaxial and maybe integral with the primary wheels, to turn, rack members meshing with the secondary wheels and connected to the windows, being thus projected or retracted to open or close the windows. Figs. 6 and 7 show the invention diagrammatically. A cable 34 having a tension and compression resisting core, is wound helically with a wire 32 so that the cable forms a long flexible rack. The cable can be moved to and fro in a conduit 46, which may have curved portions, and in doing so meshes with and rotates a gear wheel 47. Also meshing with the wheel is a rack member 48 which is connected by its end to the window,. movement of cable 34 in one direction thus causing the window to open and vice versa. In the above case the primary and secondary gears are made integral, but if necessary the shaft of gear 47 may be extended and carry a number of secondary gears, each meshing with its own rack 48. Figs. 11 and 12 show the invention applied to a top hung window 53, the gear wheel 47 being mounted in a box secured, pivotally or not, to the window frame, the cable 34 and rack 48 passing through tangential passages on the box sides. Several windows can be opened simultaneously from a single position, the primary cable 34 then passing through several gear boxes (Figs. 22 and 22 not shown).
Patent GB-1272388-A (GB)
Title: Gas blast circuit breaker
IPC: H01H3/60
Filed: 1970-07-09
Abstract: 1,272,388. Gas blast circuit breakers. BROWN, BOVERI & CO. Ltd. 9 July, 1970 [11 July, 1969], No. 33360/70. Heading H1N. A gas blast circuit breaker has a movable nozzle contact 1 operated from a closed position to an open position, against spring 2, pressure, by a high pressure gas blast, and has two pneumatic damping chambers 6 and 12 acting to retard the contact opening and closing movements respectively. Piston 4 forming part of the movable contact 1 slides within the chamber 6 and compresses during the contact opening operation the high pressure gas within, introduced via passage 7. Piston 10 is engaged by a shoulder of the moving contact and compresses gas; introduced into chamber 12 via passage 13, during the closing operation of the contacts. Throttling parts 8 and 11 are provided between respective chambers and low pressure regions. A spring 15 damps the vibrations caused by the opening operation.
Patent GB-307122-A (GB)
Title: Improved method of and apparatus for automatically controlling the lighting of street lamps and the like
IPC: H01H37/32
Filed: 1927-12-09
Abstract: 307,122. Gregory, H. S., Matthews, (nÚe Marshall), S., and Archer, C. T. Dec. 9, 1927. Light radiations, control of apparatus by.-Two metal leaves or strips of foil A, B are mounted in a web M under reduced pressure, one A being fixed at both ends, whilst the other B has a free end which curls outwards by radiometers action under the influence of light to close a contact at E and so energize a local circuit. The fixed foil A is blackened on one or both sides by smoke from burning camphor or otherwise, whilst the free foil B is left bright. A quartz or other lens may be arranged to focus daylight, for example, upon the blackened strip. The device is applicable to the automatic lighting of street lamps, to the control of traffic " light-houses," and to the regulation of a source of heat such as a furnace.
Patent GB-656934-A (GB)
Title: Improvements in or relating to a rotatable rabble shaft for use in roasting furnaces
IPC: F27B9/24
Filed: 1948-12-29
Abstract: 656,934. Furnace rabble shafts. NICHOLS ENGINEERING AND RESEARCH CORPORATION. Dec. 29, 1948. No. 33393.- Convention date, Jan. 6. [Class 51(ii)] In a rabble shaft for roasting-furnaces comprising an inner shaft and outer surrounding shaft unequal expansion of their walls is allowed for by connecting them together by the engagement of outwardly extending lugs or fingers on the inner shaft with inwardly extending lugs or fingers on the surrounding shaft. As shown applied to a furnace having. superposed hearths 10, 11, 12, the tubular sections 20, 21, 22 of the outer surrounding shaft are connected to corresponding inner shaft sections 23, 24, 25 by stud and bolt devices 28 which tightly clamp together lugs 26, 30, 35 formed integral with the inner sections and lugs 27, 31, 34 formed integral with the outer sections. As shown, Fig. 6, the adjacent faces of the lugs are in spaced relationship the outer lugs such as 27 being free to move outwardly away from the joints on radial expansion of the outer sections. Longitudinal differential expansion between the members is provided for by severing the inner tubular sections at their mid points, as at 24a, and providing a seal at those points such as a ring of resilient metal 32 which tends to expand to seal the fracture. As cooling air is conducted to and from the hollow rabble arms via the inner shaft and the annular space between the shafts respectively, this seal prevents air from leaking into the furnace. The rabble arms such as 15a, 15c, are disposed near the extremities of the sections 21, 24. and therefore near corresponding lugs 26, 27, 30. 31 so that no appreciable misalignment of said arms can occur due to expansion. In a modification only one extremity of corresponding inner and outer sections are clamped together, the sections being connected at the opposite extremity by a stud and shank arrangement (dotted lines -Fig. 7). which will allow some relative longitudinal movement. This eliminates the necessity of a fracture, 24a, but only one set of rabble arms are then mounted on each such section and these adjacent the tightly held extremity.
Patent GB-940809-A (GB)
Title: Improvements in or relating to series regulator circuit arrangements
Inventor: WATKINS KENNETH MICHAEL
IPC: G05F1/571
Filed: 1959-10-02
Abstract: 940,809. Automatic voltage control. WESTINGHOUSE BRAKE & SIGNAL CO. Ltd. Oct. 3, 1960 (Oct. 2, 1959], No. 33432/59. Heading G3R. [Also in Division H2]  A series regulator arrangement includes both an excess current protective circuit and an overvoltage protective circuit. As shown, a load 2 is supplied from a power supply source 1 over a transistor 6 the base of which is connected to a further transistor 16 which, under excess current conditions, is rendered conducting, by a trigger circuit comprising further transistors 13, 14 and 15 and resistors 7, 8 and 9, to bias transistor 6 to cut-off. The over-voltage protective circuit includes a capacitor 26 to which a bias voltage is applied from the power supply 1; on the collectoremitter voltage of transistor 6 exceeding a value determined by a Zener diode 28, current flows through the capacitor 26 to actuate a relay A/1 whose contacts A1 open-circuit the voltage supply path to the transistor. The normal control signal for transistor 6 is taken from terminal 24.
Patent GB-866703-A (GB)
Title: Composite hot top and method of making same
IPC: B22D7/10
Filed: 1959-10-05
Abstract: 866,703. Ingot moulds. OGLEBAY NORTON CO. Oct. 5, 1959 [Oct. 8, 1958], No. 33649/59. Class 83 (1). A hot top is provided with a bottom heatprotective ring which is moulded in situ to cover the end of the hot top casing with settable fictile heat-protective material. The ring 18, Fig. 1, may be moulded by hand at the same time as the inner lining of the hot top is being repaired. Alternatively, Fig. 3, the ring 18 is formed integrally and simultaneously with a veneer lining 33 to the hot top by forcing the material into the space between the inner wall of the hot top and a mandrel 36.
Patent GB-619004-A (GB)
Title: Electric garden frame heater
IPC: H05B3/00
Filed: 1946-11-19
Abstract: 619,004. Tubular electric heaters. RISELEY, W. B. Nov. 19, 1946, No. 34187. [Class 39 (iii)] A heater for garden frames or incubators comprises resistance wires 5 mounted in diamondshaped tubes formed in pairs from opposed pressed metal casings 1, which are riveted or welded together along a flat intermediate neck 20 to which L-shaped brackets 7 are attached,. The wires 5 are passed through slightly staggered holes in insulating discs 4 supported on metal rods 3 held in insulating end caps 9 carrying terminal members 12. The end caps 9 are flanged to project into the tubes and have upper projecting hoods 8. The heaters may comprise more than two tubes and are painted black. The brackets 7 may have prongs to earth the casing. Several heaters may be connected in series, the end heater having a thermostat at one end.
Patent GB-1100058-A (GB)
Title: Means for guiding two relatively movable members in a circular direction
Inventor: FORSTER LESLIE GORDON
IPC: F16C19/00
Filed: 1965-08-11
Abstract: 1,100,058. Bearings. FORSTERS MACHINE CO. Ltd. 11 Aug., 1965, No. 34421/65. Heading F2A. In apparatus for guiding a member in a circular path relatively to a fixed member having a circular or part-circular periphery, pairs of ball-bearings are mounted on three equiangularly spaced supports 4, Fig. 1, carried by a member 2, the outer race 7, Fig. 2, of each pair of bearings being chamfered, the resulting " V "-shaped groove being engaged by a " V "- shaped inner peripheral edge 8 of an annular member 1. The inner races 6 are clamped by a nut 10 to a portion of the support 4 which may be offset from the centre of a stem portion 11, by which it is bolted to the member 2, so as to provide eccentric adjusting means. In a modification, the angle of the " V "-shaped groove is greater than the angle of the " V "-shaped edge 8. The inner races may be spaced apart by a thin washer so that the outer races 7 clear each other. In another embodiment, an arcuate member 16, Fig. 3, has " V "-shaped edges engaged by an accentrically-mounted bearing 21 and bearings 20 respectively, the bearings being mounted on a movable member 15.